2D vectors

2D vectors are added by adding their corresponding coordinates or by connecting them β€œhead to toe”.

To subtract 2D vectors, reverse the direction of the vector that is subtracted or subtract corresponding coordinates.

Two vectors can be multiplied by using a dot product, which can be obtained by multiplying corresponding coordinates and adding the results up. Alternatively, cosine value of an angle between the vectors may be used.

The magnitude of a 2D vector is found using Pythagoras' theorem for a right angle triangle, given by M = √(a² + b²).

If vectors are multiples of each other, they are parallel to each other.


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